Skip to content
Fencer Intel
medium 5.9

CVE-2018-16875 json

Denial of service in chain verification in crypto/x509

published 7y ago modified 4mo ago also GO-2022-0191 , EUVD-2018-8666

cvss
5.9
version 3.0, CNA
cisa kev
Not listed
not in CISA's catalog
epss
6.5%
EPSS 6.5% chance of exploitation in 30 days, percentile 93%
public exploits
0
none known

Summary

The crypto/x509 package of Go before 1.10.6 and 1.11.x before 1.11.3 does not limit the amount of work performed for each chain verification, which might allow attackers to craft pathological inputs leading to a CPU denial of service. Go TLS servers accepting client certificates and TLS clients are affected.

Patch / fix

  • go stdlib 1.10.6, 1.11.3
  • golang go 1.10.6, 1.11.3
  • docker-stable SLES for SAP 15 SP5, SLES for SAP 15 SP4, SLES for SAP 15 SP3 +12 more 24.0.9_ce-150000.1.25.1
  • etcd openSUSE Leap 15.6, openSUSE Leap 15.5 3.5.12-150000.7.6.1
  • runc SLE Module for Containers 12 1.0.0~rc93-16.8.1
  • docker SLE Module for Containers 12 20.10.6_ce-98.66.1
  • containerd SLE Module for Containers 12 1.4.4-16.38.1
  • helm-mirror SLE Module for Containers 15 SP1, SLE Module for Containers 15 0.2.1-1.7.1
  • golang-github-docker-libnetwork SLE Module for Containers 15 SP1, SLE Module for Containers 15 0.7.0.1+gitr2726_872f0a83c98a-4.12.1
  • docker SLE Module for Containers 15 SP1, SLE Module for Containers 15 18.09.6_ce-6.17.1

suse advisories SUSE-SU-2025:03545-1SUSE-SU-2025:03540-1SUSE-SU-2024:3656-1SUSE-SU-2021:1458-1SUSE-SU-2019:0048-2SUSE-SU-2019:1234-2

  • helm3 openSUSE Tumbleweed 3.19.2-1.1
  • docker-stable openSUSE Tumbleweed 24.0.9_ce-15.1
  • containerd openSUSE Tumbleweed 1.4.8-2.2
  • docker openSUSE Tumbleweed 20.10.6_ce-2.1
  • etcd openSUSE Tumbleweed 3.4.16-3.1
  • flannel openSUSE Tumbleweed 0.14.0-1.2
  • go openSUSE Tumbleweed 1.17-1.1
  • go1.10 openSUSE Tumbleweed 1.10.8-8.2

opensuse advisories openSUSE-SU-2025:15779-1openSUSE-SU-2025:15589-1openSUSE-SU-2024:10693-1openSUSE-SU-2024:10722-1openSUSE-SU-2024:10741-1openSUSE-SU-2024:10761-1

  • go Arch Linux 2:1.11.3-1

arch linux advisories AVG-835

Is CVE-2018-16875 in your dependencies? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

Check with Fencer

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2018-16875 updated cvss 7.5

golang: crypto/x509 allows for denial of service via crafted TLS client certificate

  • Red Hat Ceph Storage 2 golang, golang-bin, golang-src
    affected: no fix planned “Will not fix”
  • Red Hat Ceph Storage 3 golang, golang-bin, golang-src
    affected: no fix available
  • Red Hat Enterprise Linux 7 golang, golang-bin, golang-src, golang-misc, golang-tests
    affected: no fix planned “Will not fix”
  • Red Hat OpenShift Container Platform 3.7 atomic-openshift, atomic-openshift-pod, atomic-openshift-node, atomic-openshift-tests, atomic-openshift-master, atomic-openshift-clients, +10 more
    affected: no fix planned “Out of support scope”
  • Red Hat OpenShift Container Platform 3.9 atomic-openshift, atomic-openshift-pod, atomic-openshift-node, atomic-openshift-tests, atomic-openshift-master, atomic-openshift-clients, +8 more Red Hat OpenShift Container Platform 3.10 atomic-openshift, atomic-openshift-pod, atomic-openshift-node, atomic-openshift-tests, atomic-openshift-master, atomic-openshift-clients, +7 more
    affected: no fix available “Fix deferred”
  • Red Hat Storage 3 golang, golang-bin, golang-src, golang-misc, golang-tests
    affected: no fix planned “Will not fix”
  • Red Hat Enterprise Linux 8 golang, go-toolset, golang-bin, golang-src, golang-misc, golang-race, +1 more Red Hat OpenShift Container Platform 3.11 atomic-openshift, atomic-openshift-pod, atomic-openshift-node, atomic-openshift-tests, atomic-openshift-master, atomic-openshift-clients, +7 more Red Hat OpenShift Container Platform 4 openshift, openshift-clients, openshift-kubelet, openshift-hyperkube, openshift-kube-apiserver, openshift-kube-scheduler, +2 more Red Hat OpenStack Platform 8 (Liberty) Operational Tools golang, golang-src, golang-pkg-linux-amd64, golang-pkg-bin-linux-amd64 Red Hat OpenStack Platform 9 (Mitaka) Operational Tools golang, golang-bin, golang-src
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

6.48% chance of exploitation in the next 30 days, higher than 93% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
CNA 3.0 5.9 CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD 3.0 7.5 CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD 2.0 7.8 AV:N/AC:L/Au:N/C:N/I:N/A:C

Affected packages

ecosystem package affected fixed in
go stdlib
<1.10.6
>=1.11.0-0, <1.11.3
1.10.6
1.11.3

Affected products

  • [UNKNOWN] golang

Classification

Weakness
  • CWE-20 Improper Input Validation
  • CWE-295 Improper Certificate Validation

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.